Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
vuc van » duc van, luc van, thuc van
cac vuc » cac nuoc, cac vung, cac cuoc
van cac » van hac, van cau, van bac
tu sach » su sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ty nang ((le hoi) or (xa hoi)). hieu van cac vuc van hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang ((le hoi) OR (xa hoi)). hieu van cac vuc van hanh thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang ((le hoi) or (xa hoi)). hieu van cac vuc van hanh thai cua tre*".